Light transmittance is crucial to helmet lenses, which directly affect the clarity of the wearer's vision. Generally speaking, the qualified helmet lens transmittance should be more than 85%, like the transparent lens transmittance for daily riding can mostly reach about 90%, so as to ensure that under various light conditions, users can see the surrounding environment and ensure riding safety.

Transparent lenses are suitable for a variety of light environments, especially in dark cloudy days, rainy days or night riding, to provide the clearest vision; Brown lenses can effectively reduce strong light and glare, suitable for use in bright sunny environment, such as riding in the hot sun, can reduce eye fatigue; The electroplated lens has a strong reflective effect, which is often used in outdoor scenes where strong light is particularly strong, such as snow riding, etc., which can protect the eyes from strong light stimulation to the greatest extent.

Optical coating has a variety of functions. For example, the anti-reflection film can reduce the reflection of light on the surface of the lens, improve the transmittance, so that the field of vision is clearer and the image is sharper; The anti-reflection film is also to reduce the reflected light interference and improve the visual effect; There are hydrophobic oleophobic film, which can make the surface of the lens not easily contaminated with water stains, oil and other dirty things, easy to clean, and maintain the good performance of the lens.

Regular helmet lenses will be tested in accordance with relevant national standards or international standards for impact resistance, such as through falling ball impact test, high-speed particle impact test and other ways to detect. When purchasing, you can check whether the product has the corresponding safety certification mark, such as in line with the EU CE certification, the United States DOT certification and other helmet lenses, in terms of impact resistance is usually up to standard, can effectively protect the eye safety in the event of an accident.

The service life of the injection mold is affected by many factors, including the mold material, the frequency of use, the complexity of the product, the injection molding process parameters and daily maintenance. In general, if it is an injection mold made of high-quality steel, used and maintained properly, it can be used hundreds of thousands or even millions of times when it is used for the production of ordinary plastic products; However, if the mold material is poor, the use of poor environment and lack of maintenance, may be used thousands of times will appear wear, damage and other problems, affecting the quality of the product.

First of all, we must consider the shape, size and accuracy requirements of the product to ensure that the mold can accurately form products that meet the design specifications; The second is the mold parting surface design, to facilitate the product demoulding; The second is the design of the flow channel system, reasonable arrangement of the flow path of the plastic melt to ensure that the melt evenly fills the cavity to avoid defects such as short shot and trapped gas; In addition, the design of the cooling system is also very important, which can affect the molding cycle and quality of the product, so that all parts of the mold should be evenly cooled.

In the production process of helmet lenses with degrees, the relevant standards and processes of optical matching should be strictly followed. First, accurate optometry to obtain accurate degrees, astigmatism and other parameters, and then in the lens grinding, processing, the use of high-precision optical processing equipment, operated by professional and technical personnel, and after the completion of the production of professional optical testing instruments to detect the refractive index of the lens, dispersion coefficient and other indicators meet the requirements, in order to ensure a good optical correction effect. So that the wearer can see and ensure the safety of the ride.

 It depends on the severity of the scratch. Minor scratches can usually continue to be used if they do not affect the line of sight, but there may be certain interference with the visual effect, such as scattering in strong light. However, if the scratch is deep and the scope is large, it will seriously affect the clarity of the line of sight, and may even lead to the deformation of the sight, in this case, it is recommended to replace the lens in time, so as not to affect the riding safety and use experience.

After the mold processing is completed, the appearance inspection must first be carried out to see whether the assembly of each part is tight and whether there is any bump. Then carry out no-load debugging, manually operate the mold opening and closing, ejecting and other actions to check whether the movement of each mechanism is smooth and whether the stroke meets the design requirements. Then the test injection molding is carried out to observe the filling of plastic melt in the mold cavity, whether the molding product has defects such as flash, lack of materials, bubbles, etc., according to the problems of the injection molding process parameters (such as temperature, pressure, pressure holding time, etc.) and the mold structure are adjusted and optimized, and the injection molding is repeatedly tested until the qualified product is produced.

When daily maintenance of helmet lenses, it is recommended to use a mild cleaning agent (such as a special lens cleaner) with a soft, clean wiping cloth to gently wipe, wiping direction as far as possible to keep the same, to avoid back and forth friction caused by scratches. When not in use, the helmet should be placed in a dry, ventilated place and avoid direct sunlight, to prevent the lens from aging, deformation and other problems due to moisture, high temperature and other environmental factors, and to avoid contact with sharp and rough objects to reduce the risk of scratching.